In some cases, changing the number of poles in the motor is a practical approach for adjusting the speed of a single phase variable speed motor. This technique, known as pole changing, works by altering the motor’s internal configuration to change the speed at which it operates. A motor with more poles will run at a lower speed, while a motor with fewer poles will operate at a higher speed. Pole changing is often used in motors where the speed needs to be adjusted at discrete levels, such as in certain fan or pump applications. The simplicity of this method, however, limits its flexibility, as the motor speed can only be changed between specific preset levels.